Tactile Wayfinder: Comparison of Tactile Waypoint Navigation with Commercial Pedestrian Navigation Systems

Abstract

Abstract. In this paper we report on a field study comparing a commercial pedestrian navigation system to a tactile navigation system called Tactile Wayfinder. Similar to previous approaches the Tactile Wayfinder uses a tactile torso display to present the directions of a route's waypoints to the user. It advances those approaches by conveying the location of the next two waypoints rather than the next one only, so the user already knows how the route continues when reaching a waypoint. Using a within-subjects design, fourteen participants navigated along two routes in a busy city centre with the Tactile Wayfinder and a commercial pedestrian navigation system. We measured the acquisition of spatial knowledge, the level of attention the participants had to devote to the navigation task, and the navigation performance. We found that the Tactile Wayfinder freed the participants' attention but could not keep up with the navigation system in terms of navigation performance. No significant difference was found in the acquisition of spatial knowledge. Instead, a good general sense of direction was highly correlated with good spatial knowledge acquisition and a good navigation performance.

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“…It was then evolved to support users' navigation as described in "I did it my way" [15]. The Tactile Wayfinder [12] explores the use of a vibrating belt to give directional information. PointNav [5] gives both orientation and navigation support through vibrations and speech feedback.…”

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“…Pielot and Boll (2010) investigated the concept of tactile waypoint navigation to overcome existing limitations in commercial pedestrian navigation systems. Minamimoto et al (2010) proposed a local map generation algorithm that could be used in the recognition of an accident site in an emergency situation.…”

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“…In contrast, haptic interfaces provide feedback that is more distinguishable from the environment, using vibrotactile stimulation on the body. A number of wearable devices, such as a headband [5], a vest [20] and belts [7,8] have been designed. Participants wearing the Haptic Radar headband [5] were able to 'see' objects coming from behind them.…”